CVE catalog
CVE-2026-87865
curl: CVE-2026-87865
- Severity
- High · CVSS 7.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.20% · Oct 25, 2026
When libcurl uses libssh2 with a hashed `known_hosts` file, an unrelated initial entry can cause host key validation to report a key *mismatch* as a *missing* key to the `CURLOPT_SSH_KEYFUNCTION` callback.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | curl | sid | 8.23.0-1 | fixed |
| Debian | curl | forky | 8.22.0-1 | vulnerable |
| Debian | curl | trixie | 8.14.1-2+deb13u5 | vulnerable |
| Debian | curl | trixie-security | 8.14.1-2+deb13u7 | vulnerable |
| Debian | curl | bookworm | 7.88.1-10+deb12u15 | vulnerable |
| Debian | curl | bookworm-security | 7.88.1-10+deb12u5 | vulnerable |
| Ubuntu | curl | 26.10 | 8.18.0-1ubuntu2 | vulnerable |
| Ubuntu | curl | 26.10 | 8.20.0-2ubuntu1 | vulnerable |
| Ubuntu | curl | 26.10 | 8.20.0-2ubuntu3 | vulnerable |
| Ubuntu | curl | 26.10 | 8.20.0-2ubuntu10 | vulnerable |
| Ubuntu | curl | 26.10 | 8.20.0-2ubuntu11 | vulnerable |
| Ubuntu | curl | 26.10 | 8.20.0-2ubuntu11.1 | fixed |
| Ubuntu | curl | 26.04 | 8.14.1-2ubuntu1 | vulnerable |
| Ubuntu | curl | 26.04 | 8.17.0-1ubuntu1 | vulnerable |
| Ubuntu | curl | 26.04 | 8.18.0-1ubuntu1 | vulnerable |
| Ubuntu | curl | 26.04 | 8.18.0-1ubuntu2 | vulnerable |
| Ubuntu | curl | 26.04 | 8.18.0-1ubuntu2.1 | vulnerable |
| Ubuntu | curl | 26.04 | 8.18.0-1ubuntu2.2 | vulnerable |
| Ubuntu | curl | 26.04 | 8.18.0-1ubuntu2.3 | vulnerable |
| Ubuntu | curl | 26.04 | 8.18.0-1ubuntu2.4 | vulnerable |
| Ubuntu | curl | 26.04 | 8.18.0-1ubuntu2.5 | vulnerable |
| Ubuntu | curl | 26.04 | 8.18.0-1ubuntu2.7 | vulnerable |
| Ubuntu | curl | 26.04 | 8.18.0-1ubuntu2.8 | fixed |
| Alpine | curl | 3.23 | 8.23.0-r0 | fixed |
| Alpine | curl | 3.24 | 8.23.0-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | curl | source | sid | 8.23.0~rc1-1 | not yet assigned | Not reported | Not reported |
| Debian | curl | source | forky | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | curl | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | curl | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Ubuntu | curl | deb | 26.10 | 8.20.0-2ubuntu11.1 | Not reported | UBUNTU-CVE-2026-87865 | Not reported |
| Ubuntu | curl | deb | 26.04 | 8.18.0-1ubuntu2.8 | Not reported | UBUNTU-CVE-2026-87865 | Not reported |
| Alpine | curl | apk | 3.23 | 8.23.0-r0 | Not reported | ALPINE-CVE-2026-87865 | Not reported |
| Alpine | curl | apk | 3.24 | 8.23.0-r0 | Not reported | ALPINE-CVE-2026-87865 | Not reported |
Notes
[trixie] curl: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [curl]Affected
Details (6)
7.88.1-10+deb12u15· amd64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u15· arm64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· amd64 · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· arm64 · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· amd64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· arm64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
- [libcurl3-gnutls]Affected
Source package: [curl]
Details (6)
7.88.1-10+deb12u15· amd64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u15· arm64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· amd64 · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· arm64 · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· amd64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· arm64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
- [libcurl3-nss]Affected
Source package: [curl]
Details (4)
7.88.1-10+deb12u15· amd64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u15· arm64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· amd64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· arm64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
- [libcurl4]Affected
Source package: [curl]
Details (6)
7.88.1-10+deb12u15· amd64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u15· arm64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· amd64 · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· arm64 · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· amd64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· arm64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
- [libcurl4-doc]Affected
Source package: [curl]
Details (6)
7.88.1-10+deb12u15· all · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u15· all · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· all · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· all · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· all · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· all · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
- [libcurl4-gnutls-dev]Affected
Source package: [curl]
Details (6)
7.88.1-10+deb12u15· amd64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u15· arm64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· amd64 · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· arm64 · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· amd64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· arm64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
- [libcurl4-nss-dev]Affected
Source package: [curl]
Details (4)
7.88.1-10+deb12u15· amd64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u15· arm64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· amd64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· arm64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
- [libcurl4-openssl-dev]Affected
Source package: [curl]
Details (6)
7.88.1-10+deb12u15· amd64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u15· arm64 · bookwormAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· amd64 · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
8.14.1-2+deb13u2~bpo13+1· arm64 · bookworm-backportsAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· amd64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
7.88.1-10+deb12u5· arm64 · bookworm-securityAffected
dsa · curl · debian · bookworm; dsa · curl · debian · 12
[Debian 13 (Trixie)]
- [curl]Affected
Details (5)
8.14.1-2+deb13u4· amd64 · trixieAffected
dsa · curl · debian · 13
8.14.1-2+deb13u4· arm64 · trixieAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· amd64 · trixie-backportsAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· arm64 · trixie-backportsAffected
dsa · curl · debian · 13
8.14.1-2+deb13u7· amd64 · trixie-securityAffected
dsa · curl · debian · 13
- [libcurl3t64-gnutls]Affected
Source package: [curl]
Details (5)
8.14.1-2+deb13u4· amd64 · trixieAffected
dsa · curl · debian · 13
8.14.1-2+deb13u4· arm64 · trixieAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· amd64 · trixie-backportsAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· arm64 · trixie-backportsAffected
dsa · curl · debian · 13
8.14.1-2+deb13u7· amd64 · trixie-securityAffected
dsa · curl · debian · 13
- [libcurl4-doc]Affected
Source package: [curl]
Details (5)
8.14.1-2+deb13u4· all · trixieAffected
dsa · curl · debian · 13
8.14.1-2+deb13u4· all · trixieAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· all · trixie-backportsAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· all · trixie-backportsAffected
dsa · curl · debian · 13
8.14.1-2+deb13u7· all · trixie-securityAffected
dsa · curl · debian · 13
- [libcurl4-gnutls]Affected
Source package: [curl]
Details (2)
8.21.0-2~bpo13+1· amd64 · trixie-backportsAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· arm64 · trixie-backportsAffected
dsa · curl · debian · 13
- [libcurl4-gnutls-dev]Affected
Source package: [curl]
Details (5)
8.14.1-2+deb13u4· amd64 · trixieAffected
dsa · curl · debian · 13
8.14.1-2+deb13u4· arm64 · trixieAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· amd64 · trixie-backportsAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· arm64 · trixie-backportsAffected
dsa · curl · debian · 13
8.14.1-2+deb13u7· amd64 · trixie-securityAffected
dsa · curl · debian · 13
- [libcurl4-openssl-dev]Affected
Source package: [curl]
Details (5)
8.14.1-2+deb13u4· amd64 · trixieAffected
dsa · curl · debian · 13
8.14.1-2+deb13u4· arm64 · trixieAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· amd64 · trixie-backportsAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· arm64 · trixie-backportsAffected
dsa · curl · debian · 13
8.14.1-2+deb13u7· amd64 · trixie-securityAffected
dsa · curl · debian · 13
- [libcurl4t64]Affected
Source package: [curl]
Details (5)
8.14.1-2+deb13u4· amd64 · trixieAffected
dsa · curl · debian · 13
8.14.1-2+deb13u4· arm64 · trixieAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· amd64 · trixie-backportsAffected
dsa · curl · debian · 13
8.21.0-2~bpo13+1· arm64 · trixie-backportsAffected
dsa · curl · debian · 13
8.14.1-2+deb13u7· amd64 · trixie-securityAffected
dsa · curl · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_12150-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-87865]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-87865]
- [https://osv.dev/vulnerability/CURL-CVE-2026-87865]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-87865]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-87865]
- [https://security-tracker.debian.org/tracker/CVE-2026-87865]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87865.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3904.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]